Ch 11 Introduction to Genetics

_{Which is true about the cross in the Punnett Square?}

• Both parents are heterozygous for the trait
• Both parents are homozygous for the trait
• One parent is heterozygous and the other is homozygous for the trait
• The trait is controlled by codominant alleles

_{How many are tall?}

• 0
• 1
• 2
• 4

Alleles for the same trait are separated from each other during the process of

• cytokinesis
• meiosis I
• meiosis II
• metaphase II

During which phase of meiosis is the chromosome number reduced?

• anaphase I
• metaphase I
• telophase I
• telophase II

What happens to the chromosome number during meiosis?

• It doubles
• It stays the same
• It divides in half
• It becomes diploid

Unlike mitosis, meiosis in male mammals results in the formation of

• one haploid gamete
• three diploid gametes
• four diploid gametes
• four haploid gametes

A situation in which a gene has more than two alleles is known as

• complete dominance
• codominance
• polygenic dominance
• multiple alleles

The physical characteristics of an organism are called its

• genetics
• heredity
• phenotype
• genotype

Organisms that have two identical alleles for a particular trait are said to be

• probable outcome of a cross
• actual outcome of a cross
• result of incomplete dominance
• result of meiosis

Differernt forms of a gene are called

• hybrids
• dominant factors
• alleles
• recessive factors